Home / 7,921.31-10,931.51-4,384.85

Finding the Fourth Proportional to 7,921.31, 10,931.51 and 4,384.85

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Solution

The fourth proportional to 7,921.31, 10,931.51 and 4,384.85 is: 6,051.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.31 : 10,931.51 = 4,384.85 : x
  2. Step 2: Convert to fraction form
    7,921.31/10,931.51 = 4,384.85/x
  3. Step 3: Cross multiply
    7,921.31x = 10,931.51 × 4,384.85
  4. Step 4: Simplify right side
    7,921.31x = 47,933,009.70
  5. Step 5: Solve for x
    x = 47,933,009.70/7,921.31
  6. Step 6: Final answer
    x = 6,051.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.